Single gang extension ring



FIG. 1 is a front-right perspective view of a single gang extension ring in accordance with the present design;

FIG. 2 is a rear-left perspective view of the single gang extension ring shown in FIG. 1;

FIG. 3 is a front view of the single gang extension ring shown in FIG. 1;

FIG. 4 is a rear view of the single gang extension ring shown in FIG. 1;

FIG. 5 is a top plan view of the single gang extension ring shown in FIG. 1;

FIG. 6 is a bottom plan view of the single gang extension ring shown in FIG. 1;

FIG. 7 is a left side view of the single gang extension ring shown in FIG. 1; and,

FIG. 8 is a right side view of the single gang extension ring shown in FIG. 1. 

CLAIM The ornamental design for a single gang extension ring, as shown. 